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Summary of the APT business session
The following is an abbreviated summary of the open discussion during the final session of the
TWAA96, on 13 December 1996. Chair: Dr D Jauncey (ATNF).
Resolutions
1. From Hayo Hase (IfAG) That the APT and APSG;
recognizing the need for a high precision global reference frame for APT and APSG regional
projects,
understanding that modern space techniques (VLBI, SLR, GPS, PRARE, DORIS) together with
other measuring techniques (gravimetry, seismography, meteorology, tide gauging) contribute in
the most efficient way, when all techniques are collocated and operated on a long term base for the
establishment and maintenance of the global reference frame,
encourages the formation of fundamental reference and calibration stations in the Asia­Pacific
region and,
endorses the hosting of the Transportable Integrated Geodetic Observatory (TIGO) by nations
in the Asia­Pacific region.
2. From John Manning (AusLIG) That the APSG;
considering the need for clearer identification of tectonic movement in the Asia Pacific Region to
better understand and predict natural events,
the need for the combination of different space geodesy techniques to avoid systematic bias,
the increasing utility of the combination of geodetic techniques towards the study of meteorology,
atmospheric, ocean circulation and the earth's interior,
recognizing that the permanent committee on GIS infrastructure for Asia and the Pacific has
initiated an Asia and the Pacific Regional Geodetic Project for October 1997,
that the project plans to combine the geodetic results from VLBI, SLR, GPS, DORIS and Gravity,
recommends that the APT supports the acquisition of geodetic VLBI data from up to six stations
for two 24 hour periods in October as a contribution to the project,
that participating VLBI analysis centres, who have the capacity, undertake correlation of results
for the relevant Geodetic baselines,
that the Shanghai Observatory undertakes the regional coordination of the data acquisition and
delivery of tapes to the Goddard Space Flight centre.
3. After a presentation from E Himwich on the status of the PC Field System (PCFS), the
meeting passed a resolution congratulating NASA on their invaluable contribution to VLBI in the
area of scheduling, and requested that this be conveyed in writing to NASA HQ.
APT experiments
Proposals for APT observations for 1997 were made as follows;
ffl 2 x 24hr Mark­3 S/X geodesy experiments, with ё6 stations to coincide with the Regional
Geodetic Project in October 1997. Nominated coordinator: Qian Zhihan (qzh@center.shao.ac.cn).
ffl 2x12hr observations of 22GHz H 2 O masers, in mid­1997 between Japan and Australia. Nom­
inated coordinator: Tetsuo Sasao (sasao@miz.nao.ac.jp).
Discussion was also made of the following two proposed observations: names of possible
participants are shown in brackets.
ffl S/X pulsar astrometry phase­reference survey (Shin'ichi Hama, hama@crl.go.jp)
ffl low­frequency (– ё90cm) pulsar observations (S Ananthakrishnan ananth@gmrt.ernet.in,
M Costa Marco.Costa@phys.utas.edu.au).
--John Reynolds (ATNF)